When it unbinds, the resulting shape-change puts the tropomyosin bodyguards back into place.

解绑时，由此产生的形状变化使原球蛋白保镖恢复原位。

Now shrimp shellfish and dust mites are all invertebrates and all of them trigger allergies thanks to a protein called tropomyosin.

虾等甲壳类动物尘螨都是无脊椎动物，们之所以触发过敏反应是因为一种叫做原球蛋白的物质。

Namely, actin is blocked by a couple of protein bodyguards — called tropomyosin and troponin — which keep getting in the way.

也就是说，动蛋白被蛋白质的保镖阻断——原球蛋白蛋白——们一直碍事。

Immediately after a muscle fiber is stimulated by a nerve — when calcium ions are flooding into the sarcomeres to pull away those two protein bodyguards of tropomyosin and troponin from the actin — that's called the latent period.

肉纤维被神经刺激后立即——离子涌入节，将动蛋白中保护原球蛋白蛋白的蛋白质带走——这称为潜伏期。

So the calcium latches on to the troponin and causes it to pull the other bodyguard protein — the tropomyosin — away from the sites on the actin strands that the myosin really wants to get its paws on.

所以锁住蛋白，并使其将另一种保护蛋白——原球蛋白——从球蛋白真正想要抓住的动蛋白链上的位置拉走。